The new infrastructure will be built using funds from the compensation agreements the government secured with Brazilian construction company Odebrecht and aircraft maker Embraer.
Seven contracts will be for the construction of the rail line, while the eighth will be to provide the rolling stock.
The country's former transparency secretary, whose body was found in an apartment in Bogotá, was cited as a defense witness by Luis Andrade, the former head of infrastructure agency ANI, who is facing charges.
Sector players have not been that confident since 2014.
Small - but vital - airports across Brazil could see diminished investments as investors focus on big and more profitable ones.
The country's procurement system will now be run by the cabinet chief instead of the public works minister.